Setup CodSpeed for continuous performance monitoring

- Replace criterion 0.3 with codspeed-criterion-compat 4.3.0 using
  dependency renaming (no benchmark code changes needed)
- Add CodSpeed GitHub Actions workflow with OIDC authentication
- Add CodSpeed badge to README

.github/workflows/codspeed.yml

@@ -0,0 +1,37 @@
+name: CodSpeed
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+  # `workflow_dispatch` allows CodSpeed to trigger backtest
+  # performance analysis in order to generate initial data.
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  codspeed:
+    name: Run benchmarks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup rust toolchain, cache and cargo-codspeed binary
+        uses: moonrepo/setup-rust@v0
+        with:
+          channel: stable
+          cache-target: release
+          bins: cargo-codspeed
+
+      - name: Build the benchmark target(s)
+        run: cargo codspeed build -p num-prime-bench
+
+      - name: Run the benchmarks
+        uses: CodSpeedHQ/action@v4
+        with:
+          mode: simulation
+          run: cargo codspeed run -p num-prime-bench

README.md

@@ -1,6 +1,7 @@
 # num-prime
 
 [![Crates.io](https://img.shields.io/crates/v/num-prime.svg)](https://crates.io/crates/num-prime)
+[![CodSpeed](https://img.shields.io/endpoint?url=https://codspeed.io/badge.json)](https://codspeed.io/uutils/num-prime?utm_source=badge)
 [![Discord](https://img.shields.io/badge/discord-join-7289DA.svg?logo=discord&longCache=true&style=flat)](https://discord.gg/wQVJbvJ)
 [![License](http://img.shields.io/badge/license-Apache%202-blue.svg)](https://github.com/uutils/num-prime/blob/main/LICENSE)
 [![dependency status](https://deps.rs/repo/github/uutils/num-prime/status.svg)](https://deps.rs/repo/github/uutils/num-prime)

bench/Cargo.toml

@@ -11,7 +11,7 @@ harness = false
 [dependencies]
 num-bigint = "0.4"
 num-prime = { path = ".." }
-criterion = "0.3"
+criterion = { version = "4.3.0", package = "codspeed-criterion-compat" }
 rand = "0.8"
 
 num-primes = { version = "0.3.0", optional = true }